linux-kernel - Re: [PATCH v2] ext4: fix BUG_ON() when directory entry has invalid rec

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Message-ID: <Y0bNc9XZA5wXNJMX@mit.edu>
Date:   Wed, 12 Oct 2022 10:21:39 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     Luís Henriques <lhenriques@...e.de>
Cc:     Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH v2] ext4: fix BUG_ON() when directory entry has invalid
 rec_len

On Wed, Oct 12, 2022 at 02:16:42PM +0100, Luís Henriques wrote:
> Grr, looks like I accidentally reused a 'git send-email' from shell
> history which had a '--in-reply-to' in it.  Please ignore and sorry about
> that.  I've just resent a new email.

No worries!  The --in-reply-to wasn't actually a problem, since b4
generally will do the right thing (and sometimes humans prefer the
in-reply-to since they can more easily see the patch that it is
replacing/obsoleting).

b4 can sometimes get confused when a patch series gets split, and both
parts of the patch series are in a reply-to mail thread to the
original patch series, since if it can't use the -vn+1 hueristic or
the "subject line has stayed the same but has a newer date" hueristic,
it falls back to "latest patch in the mail thread".  So if there are
two "valid" patches or patch series in an e-mail thread, b4 -c
(--check-newer-revisions) can get confused.  But even in that case,
that it's more a minor annoyance than anything else.

So in the future, don't feel that you need to resend a patch if
there's an incorrect/older --in-reply-to; it's not a big deal.

Cheers, and thanks!

						- Ted